期刊
ELECTROCHIMICA ACTA
卷 81, 期 -, 页码 217-223出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.07.090
关键词
Solid oxide fuel cells; Cathode; Electrical conductivity; Oxygen non-stoichiometry; Electrochemical performance
资金
- WCU (World Class University) program [R31-2009-000-20012-0]
- Basic Science Research Program through the National Research Foundation of Korea [2012-R1A1A1013380]
- Ministry of Education, Science and Technology
- New AMP
- Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant [20113020030060]
- Korea government Ministry of Knowledge Economy
- Korea Evaluation Institute of Industrial Technology (KEIT) [20113020030060] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The effect of Sr substitution for Nd on Nd1-xSrxCoO3-delta (NSC)(x = 0.3, 0.4, 0.5, 0.6, and 0.7) is investigated to evaluate NSC as a cathode material based on Gd0.1Ce0.9O1.95 (GDC) electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The NSC powders are prepared by the glycine nitrate method. At a given temperature, the electrical conductivity increases with increasing Sr content up to x = 0.5 and then decreases for x > 0.5. The redox behavior of NSC (x = 0.3, 0.5, and 0.7) cathodes is studied by the coulometric titration at 700 degrees C. In order to investigate the area specific resistances of NSC-GDC cathodes, symmetrical half cells (cathode/electrolyte/cathode) are measured using impedance spectroscopy at various temperatures in air under open circuit voltage (OCV) condition. The electrochemical performance of NSC-GDC cathodes is measured using an NSC-GDC/GDC/Ni-GDC anode supported cell. The maximum power density of NSC-GDC cathodes increases with increasing strontium content up to x = 0.5 and then decreases at 700 degrees C. In terms of electrical conductivity and electrochemical performance, Nd1-xSrxCoO3-delta (x = 0.5) is more suitable as a cathode material based on GDC electrolyte in IT-SOFC applications. (c) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据